这是个抛物线，因此关于P点轴对称。

This is a parabola, so it's completely symmetric about the vertical, about p.

youdao

抛物面碟面的优点是能将波束在它的焦点处汇聚到一个单一的点，产生一个清晰、强力的信号。

Parabolic dishes have the advantage that they point their beams to a single point at their focus, creating a clear and strong signal.

youdao

这种情况所产生的一组点是抛物线。

The resulting set of points in this case is a parabola .

youdao